DJI Dock 2/Matrice 3D Series Unmanned Aircraft Flight Manual
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Connecting the Remote Controller as Controller B
To ensure ight test safety, the remote controller can be used to take control of the aircraft 
manually during on-site flight tests after connecting to the aircraft as controller B. Link the 
remote controller to the aircraft as controller B following the steps below: 
1.  Power on the remote controller and the aircraft.
2.  Run DJI Pilot 2, select Matrice 3D Series in the homepage.
3.  Tap Controller A > Switch to Controller B.
4.  Press and hold the power button of the aircraft for more than four seconds. The aircraft will 
beep once, and its battery level LEDs blink in sequence.
5.  When linking is successful, the remote controller will beep twice.
• Make sure to link the dock and the aircraft rst, and then link the remote controller 
and the aircraft.